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L-Tryptophan is an amazing essential amino acid.
(Source Naturals)  Source Naturals brings you this pure essential amino acid that supports relaxation, restful sleep and a positive outlook. Helps in the synthesis of both melatonin and serotonin. A precursor to the kynurenines that regulate immunity, L-tryptophan also converts to niacin when the body needs it in order to support circulation, the nervous system and the metabolism of food.
  Item # Size Price
51737500 mg/120 capsules $18.29 $17.58  


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